/Engine/Source/Runtime/GeometryCore/Public/CompGeom/PolygonTriangulation.h
Compute triangulation of simple 2D polygon using ear-clipping
namespace PolygonTriangulation { template<typename RealType> void PolygonTriangulation::TriangulateSimplePolygon ( const [TArray](API\Runtime\Core\Containers\TArray)< [TVector2](API\Runtime\Core\Math\TVector2)< RealType >> & VertexPositions, [TArray](API\Runtime\Core\Containers\TArray)< [FIndex3i](API\Runtime\GeometryCore\FIndex3i) > & OutTriangles, bool bOrientAsHoleFill ) }